Core Java courses can help you learn object-oriented programming, exception handling, multithreading, and Java Collections. You can build skills in writing efficient algorithms, debugging code, and developing user interfaces. Many courses introduce tools like Eclipse and IntelliJ IDEA, which are commonly used for coding and testing Java applications, along with frameworks such as Spring and Hibernate that facilitate web development and database management.
Coursera
Skills you'll gain: API Testing, Test Script Development, Scenario Testing, Software Testing, Integration Testing, Test Case, Test Automation, Acceptance Testing, Test Tools, Regression Testing, Test Execution Engine, Maintainability, User Interface (UI), Security Testing, Test Data, Scalability, Debugging, Authentications, Compliance Reporting, Automation
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Unity Engine, Torque (Physics), Game Design, Video Game Development, Mechanics, Simulations, Mathematical Modeling, Physics, Engineering Calculations, Scripting, C# (Programming Language), Linear Algebra, Applied Mathematics
Mixed · Course · 1 - 4 Weeks

Skills you'll gain: Cloud Infrastructure, Virtualization, Software-Defined Data Center (SDDC), VMware ESX Servers, Virtual Machines, Virtualization and Virtual Machines, vCenter Server, Cloud Computing, Containerization
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Blockchain, Transaction Processing, Secure Coding, Distributed Computing, Data Integrity, Integrated Development Environments, Program Development, Cryptography, Development Environment, Virtual Machines, Software Development Tools
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Active Directory, Security Management, Azure Active Directory
Intermediate · Course · 1 - 3 Months

Packt
Skills you'll gain: Networking Hardware, General Networking, Network Infrastructure, Local Area Networks, OSI Models, Network Protocols, Network Troubleshooting, Dynamic Host Configuration Protocol (DHCP), TCP/IP, Network Architecture, Computer Networking, Network Model, Wireless Networks, Network Security, Network Switches, Virtual Local Area Network (VLAN)
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Graph Theory, Javascript, Program Development, Programming Principles, Software Design Patterns, Computational Thinking, Debugging, Development Environment, Computer Science, Performance Tuning
Intermediate · Course · 1 - 3 Months

Simplilearn
Skills you'll gain: Convolutional Neural Networks, Image Analysis, Computer Vision, Deep Learning, Artificial Neural Networks, Model Evaluation, Data Preprocessing, Python Programming
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Apache Spark, Apache Hadoop, Data Lakes, Big Data, Linux Commands, File Systems, Data Management, Command-Line Interface, Data Processing, Software Installation, Distributed Computing, System Configuration
Intermediate · Course · 1 - 4 Weeks

Amazon Web Services
Skills you'll gain: Amazon Web Services, Amazon S3, Amazon CloudWatch
Mixed · Course · 1 - 4 Weeks

Skills you'll gain: MySQL, SQL, Databases, Relational Databases, Performance Tuning, Software Installation, Data Management, System Configuration
Beginner · Course · 1 - 3 Months

Skills you'll gain: Salesforce, Data Sharing, Authentications, Web Analytics, Single Sign-On (SSO), User Accounts, Data Access, Drive Engagement, Cloud Development, Customer experience improvement, Dashboard, Role-Based Access Control (RBAC), Registration, Content Management
Advanced · Course · 3 - 6 Months